Lubricating apparatus



June 10, 1930., H. J. MURPHY 1,763,062

LUBRICATING APPARATUS Filed Feb. ll, 1925 V @ff/agi @y Ew,

irl/aras HOWARD J'. MURPHY, OF READING, MASSACHUSETTS,"ASSIGNOR, BYMESNE ASSIGN- MENTS, T ALEMITE CORPORATION, OF CHICAGO, ILLINOIS, ACORPORATION OF DELAWARE LUBRICATING APPARATUS Application filed Februarycross-section Fig. 3 is an enlarged section of the discharge end of theMgun shown fully engaged with the nipple through which the barrel of thegun is filled; v

Fig. 4 is a fragmentary section of the barrel of the gun. showing thepiston being pushed forward by the stem; and'` Fig. 5 is a section onthe line 5-5 of Fig. 3, showing the perforations through which thelubricant passes to the nozzle.-

Referring to the drawings, I .have shown a simpliied form oflubricant-eXpelling-gun. which may be easily assembled and disassembledand which may be lled with lubricant through the nozzle, withoutIdisassembling any of the parts.

The apparatus for filling the gun illustrated in the drawings may be thesame as that more fully illustrated andfdescribed in my co-pendingapplication Serial No. 8,584, filed herewith. f

The preferred form of lubricant-expelling gun includes the -usual formof barrel 1 hav-- ing a rea'r head-2 into which is threaded .a stem' 3having, outside the barrel, a handle 4 for feeding the stem relative tothe head 2. Withinthe barrel, the stem carries a disk 5 which provides aguide for the stem. The plunger 6. which is of the usual form, is

separate from the stern. Thus the stem'is only used to move the plunger`6 toward the discharge end ofthe gun to feed the lubricant theretol(Fig. 4).

The discharge end of the barrel 1 is drawn out to a reduced portion 7,which is threaded internally and externally for engagement with theparts of the nozzle. A nozzle sleeve 8 is secured to the externalthreads as illus- 11, 1925. seriai No. 8,587.'

trated in Figs. 1 and 3, and presents female coupling threads 10forfcoupling engagement with male threads of the lubricantreceivingnipple (not shown) and male threads 13 on the nipple 14 located on thehead 15 of the supply tank 16 (Figs. 2

- and 3).

Al closure valve unit comprising a valve seat part 17, a valve 18, adisk 19 and spring 20, is threaded into the reduced end portion 7 Thethreads for the valve part may be eliminated, if desirable.` Thisl valveunit is completely-'assembled before assembly with p the rest of thegun, the disk forming a seat for one end of the spring 20 and beingprovided with holes or perforations 21 through which the lubricant maypass.

/ The usual hat-shaped sealing. Washerv 22 and centering part 23 areheld between the outer end of the valve unit and a shoulder 24 back vofthe female threads 10, as illustrated in Figs. 1 and ,3f If for anyreason, the valve fails to work, the valve unit may be disassembled fromthe reduced end portion by first removing Lthe nozzle sleeve 8.

The valve unit may thenbe repaired or a new one inserted inits placealllof which can be effected very easily and quickly Without the a'id of askillful mechanic.

Assuming the gun barrel l to be empty, as illustrated in Fig. 1, themethod ofgelling is as follows. First, the stem may b retracted byspinning the handle 4 in a. lockwise direction. `This may beaccomplished by hand or by theusejof thedevice illustrated and describedlin the above-mentioned application. The relation of parts of the gunwill then be as illustrated in Fig. 1. Next, grasp the barrel 1 andengage the nozzle over the end of the nipple 14 presented by the supplytank as shown in Figi. 2. Further turning of the barrel will engage thecoupling threads 10 and 13, thereby drawing the gun toward the nipple14,-which engages theend of the closure valve 18 and moves it way fromits seat. Before Afull coupling Vengagement has been accomplished, thevalve 25 in the nipple 14 will be opened and lubricant may then flowthrough the passage 26 in the end of the valve 2 5 through the slot 27in the end leo of the valve 18 past the valve seat and through theperforations 21 (Fig. 5) in the disk 19 to the barrel 1. The pressure.of the lubricant acts against the plunger 6 to move it toward the rearend of the barrel, thereby permitting the barrel to fill with lubricant.The air in the barrel 1 'behind the plunger may be forced out-throughthe threads on the stem with very little resistance, thereby requiringless pressure on the lubricant than when the air has to be forced by theplunger before the barrel may be filled asis the case When the plungeris secured to the stem.

The spring 28, which normally closes the Valve 25, is stronger than thespring 20, thus permitting the valve 18 to open before the valve 25opens, and conversely closing the valve 25 to cut olf the supply oflubricant before the closure valve 18 closes.-

While I have shown and described a'preferred embodiment of my invention,it will be understood that changes involving omission, substitution,alteration and reversal of parts, and even changes in the mode ofoperation, may bemade without departing from the scope of my invention,which is best defined in the appended claims.

Claims.

1. A lubricant-expelling device comprising, in combination, a supplybarrel presenting aA reduced front end portlon, a nozzle sleeve securedto said reduced end portion, said nozzle sleeve having means for .makinga quick detachable connection with a lubricant receiving nipple and aclosure valve unit enclosed by said reduced end portion and said sleeve,said valve unit removable completely assembled from said reduced endportion pursuant to the removal of said nozzle sleeve.

2. A lubricant-expelling device comprising, in combination,a supplybarrel presenting an integral reduced front end portion, a nozzle sleevehaving means for makingaquick detachable connection with a lubricantreceiving nipple and secured externally to said relduced end portion andan inwardly opening closure valve unit comprising a valve seat lpart, adisk secured to one end of said valve seat part and a spring interposedbetween said disk and said valve normally to close said valve againstits seat, said valve unit secured to said reduced end portion andremovable therefrom pursuant to the removal of said nozzle sleeve fromsaid reduced end portion. 3. .A lubricant-expelling device compris- 1ng,1n combination, a lubricant supply barrel having at one end thereof areduced end portion interiorly and eXteriorly threaded, a

coupling sleeve presenting internal threads Y engaging the externalthreads of said reduced end portion, and a -completely assembled closurevalve unit presenting exterior threads engaging the interior threads ofsaid reduced end portion, said valve unit being protected by saidsleeve.

tion, a' valve seat part, an inwardly opening valve held against saidseat by a spring, and a perforated disk rigidly secured to one end ofsaid valve seat part to provide a seat for one end of the spring, and tohold said spring and valve in assembled relation with said valve seatpart in such manner that the Valve unit. cannot be tampered with.

5. Lubricating apparatus comprising, in combination, a lubricantcompressor having a barrel, an imperforate leather sealing plungerreciprocable in said barrel, a metal disc secured at one surface of saidplunger having a ball socket formed therein, and a screw handleforadvancing said plunger having a ball formed on the end thereoffricbarrel, a metal disc securedl thereto having a spherical depressiontherein, and a handle provided with a ball on one end frictionally toengage the spherical depression in the metal disc to control the advanceof the plunger thereby to cause the egressl of lubricant, said plungerbeing adapted to be automatically moved to the rear of said barrel bythe ingress of lubricant when said handle is in a retractediposition.-

lin-testimony whereof, I have signed my name to this specification.

HoWAi-in J. MURPHY.

